172950905 has 16 divisors (see below), whose sum is σ = 210288000. Its totient is φ = 136539648.

The previous prime is 172950887. The next prime is 172950923. The reversal of 172950905 is 509059271.

172950905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (172950887) and next prime (172950923).

It is a cyclic number.

It is not a de Polignac number, because 172950905 - 2⁸ = 172950649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256649 + ... + 257321.

It is an arithmetic number, because the mean of its divisors is an integer number (13143000).

Almost surely, 2^172950905 is an apocalyptic number.

It is an amenable number.

172950905 is a deficient number, since it is larger than the sum of its proper divisors (37337095).

172950905 is a wasteful number, since it uses less digits than its factorization.

172950905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280.

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 172950905 is about 13151.0799936735. The cubic root of 172950905 is about 557.1527515071.

The spelling of 172950905 in words is "one hundred seventy-two million, nine hundred fifty thousand, nine hundred five".